Powder box



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ATTORNEYS,

@et 8 1940. H M. CARTER ET AL POWDER BOX Filed Feb. 16, 1937 Patented Oct. 8, 1940 UNITED STATES PATENT OFFICE POWDER BOX Horace M. Carter and Walter Langer, New `:Yorin Application February 16, 1937, Serial No. 125,952

7 claims. (ci. 229-6) This invention relates to powder boxes. It through the filtering vent is greatly minimized. relates particularly to powder boxes of the type Further purposes, features and advantages of having longitudinally slidable telescoping walls. this invention will be apparent from the follow- Powder boxes have been commonly made hereing description of certain illustrative emboditofore which are usually cylindrical in shape and ments of this invention shown in the accompany- 5 comprise a container part and a cover part. The ing drawing, wherein:

container part and cover part have longitudi- Figure 1 is a perspective view of one form of nally slidable telescoping walls which are norpowder box embodying this invention; mally made so as to fit relatively snugly with re- Figure 2 is a side cross-sectional View of the spect to each other and thereby prevent the espowder box shown in Fig. 1; 10 cape of powder from the box. Such powder boxes, Figure 3 is a side cross-sectional view of an while extensively manufactured, nevertheless alternative form of powder bo/x embodying this have serious defects. y Upon removing the cover invention; and from a box of this character, a partial vacuum is Figure 4 is a side cross-sectional view of an created in the box which increases as the cover additional modified form of powder box embody- 15 is withdrawn and which is especially great when ing this invention. attempt is made to remove the cover quickly. Referring to Figs. 1 and 2, a powder box em- As soon as the lower end of the side wall of the bodying this invention is indicated generally by cover reaches the upper end of the side wall of the reference character I0. The powder box inthe container, the vacuum is suddenly released cludes a container part II. The powder box also 20 causing a rapid inrush of air which disturbs the includes the cover I3. The side walls of the conpowder and causes it to fly about with resultant tainer and cover are longitudinally slidable so as annoyance as the powder tends to get on clothing, to telescope one within the other. The side wall mirror surfaces, the bureau top, etc. When the of the container II is composite in structure and cover is replaced on the powder box, the air which includes an inner imperforate layer I2 of sheet 25 is entrapped therein has to escape. While the material and an outer imperforate layer I4 of sliding contact between the side Wall of the cover sheet material which is spaced from the inner and container may be quite snug, the compreslayer l2 by a DOTOUS filtering medium l5. The sion of the air within the box perforce must cre-- filtering medium I5 may be made of any Suitable 80 ate an exit through which the air rushes. This material such as a soft porous felt or a Woven 30 rushing air tends to carry powder with it which fabric of open weave having a multiplicity of flies out of the box with the undesirable and loosely disposed fibers which are adapted to enannoying results above mentioned. Moreover, a tangle powder thereon4 while permitting the serious waste of powder results from the repeated movement of air therethrough. The layer I4 in 85 escape of powder from the box. the embodiment shown in Fig. 2 terminates ad- 35 It is a purpose of this invention to overcome jacent the bottom of the container so as to leave defects of the character aforesaid and to afford a small space l5 between lille lOWeI end 0f the a new type of powder box from which the unlayer I4 and the bottom of the container Il. As intentional escape of powder is minimized and shown in the drawing, the filtering medium l5 iS 4g which can be produced economically. in communication with the interior of the box 40 It is a feature of this invention that a nltering when the cover is on the box. In this Way. the medium is introduced into the structure of the Space between the layer l2 and the layer I4 a-fpowder box in such position that it'entangles fords passage means communicating between the powder thereon which might otherwise escape interior and the exterior of the box, which pasfrom the box. This filtering medium is positioned sage means contains a filtering medium adapted 45 in a passage which communicates between the to entangle DOWder thereen While permitting the interior and exterior of the box and affords a movement 0f all' therethrough. The side wall il filtering vent that not only prevents escape of of the cover I3 is in longitudinal slidable telescoppowder but also prevents the building up of either ing Contact With the eXteriOI 0f layer I4. Prefer- 60 a vacuum or a state of compression Within the ably, the interior 0f Side Wall |4 fils aS snugly 50 box. Moreover, by providing a vent with a lter- Upon the exterior 0f the layer I4 as convenience ing medium therein for the inlet and outlet of in the removal of the cover I3 will permit. A air during the removal of the cover from the box small amount of some suitable adhesive, such as and the closing of the cover on the box, the tend-` glue, can be used to unite the faces of the filterency of air carrying powder to escape except ing medium with the layers I2 and I4, although .15

2|] and a cover 2|.

the adhesive should penetrate the filtering medium to as slight an extent as possible so as to obstruct as little as possible the movement of air therethrough.

From the foregoing description of the embodiment of this invention shown in Figs. 1 and 2, the advantages and utility thereof are believed to be apparent. For the purpose of illustrating the functioning of the box, it first may be assumed that the cover has .been removed from the box and that the box contains a considerable amount of powder I8 which is of light character which tends to fly about in the air. When the bottom of the side wall of the cover is placed in contact with the upper end of the wall of the container, it is free to slide down because air can readily escape through the filtering medium l5 between the layers I2 and M, as indicated by the arrows in Fig. 2. This greatly facilitates the putting of the cover in place as compared with prior devices. Many prior devices can be closed but, due to the air pressure built up therein, tend to automatically partially reopen. Any such dimculty is obviated according to this invention. However, it is of primary importance according to this invention that any powder within the box which may have been disturbed in putting the cover in position and which would normally be contained in air escaping from the box is entangled in the filtering medium so that it does not escape from the box and fly about the room. When it is desired to use the powder, the cover can be removed readily. Due to the means provided for movement of air, removal of the cover does not create a vacuum Within the box, which vacuum if created and suddenly released would tend to cause the powder to fiy about. The flow of air through the ltering medium l5 into the box as the cover is removed has the additional advantage of tending to cleanse the lter and to prevent it from becoming clogged with powder.

A modified form of powder box embodying this invention is shown in Fig. 3. In this modification, the powder box i includes a container The container has the upstanding side Wall 22 and the cover 2| has the downwardly extending side Wall 23. These side walls are longitudinally slidable in telescopic relation with respect to each other in the manner hereinabove mentioned. In this embodiment of this invention, the cover includes an inner layer 24 of sheet material which has perforations 25 therein. Between this inner layer 2d and the outer layer of the cover is disposed a filtering medium 26 which may be similar to the filtering medium hereinabove described in connection with Fig. 2. At the margin of the cover 2| are perforations 21, which afford communication between the filtering medium 26 and the exterior of the box. The inner layer 2G of sheet material is ush with the side Wall 23 of the cover so that a passage is afforded which at perforations 25 communicates with the interior of the box and at perforations 21 communicates with the exterior of the box. In this passage is disposed the filtering medium 26 which is adapted to entangle powder thereon while permitting movement of air therethrough. 'Ihe faces of the filtering medium may be bonded to the cover 2| and layer 24 by some suitable adhesive.

The operation of the 'embodiment shown in Fig. 3 is believed to be apparent. When the cover is placed on the powder box, air will pass through the perforations 25, through the filtering medium 26, and out through the perforations 21.

Any powder contained in this air will be entangled by the filtering medium 26. When the cover 'is removed, air will move in the reverse direction to that just mentioned.

In Fig. 4, an additional embodiment of this invention is illustrated. This embodiment is substantially identical with that shown in Fig.

3, and in so far as there is such identity the parts thereof have been indicated by similar reference characters to those given in Fig. 3. In this modification, however, the inner layer 24 of sheet material, instead of terminating adjacent the top of the cover, is brought all the way down the side Wall of the cover so as to terminate near the bottom thereof. The filtering medium 26 is likewise brought down to the bottom of the cover 2| and is exposed to the outside air at the bottom of the side Wall of the cover. In this construction, passage means between perforations 25-and the lower end of the filtering material 26 is afforded, and .in the manner aforesaid the filtering material 26 which is within the passage serves to entangle powder thereon so that powder cannot escape from the box. Y

A powder box embodying this invention removes the diiculties hereinabove mentioned which have existed heretofore in connection with such articles. Spillage of powder from the box because of the settingA up of air currents is entirely prevented. Moreover, due to the venting of' the air, the manipulation of the cover in both taking it off and placing it back on is greatly facilitated. In this manner, the tightness of the box in those parts where there is no air filter can be increased so as to prevent any escape of powder from the box at such points. The venting of the air from the box is, however, controlled so that, While it can take place readily, it takes place only through a filtering medium which is adapted to entangle t powder thereon.

While lthis invention has been described in connection With certain illustrated embodiments thereof, it is to be understood that this has been done merely for the purpose of affording specific illustrations thereof, and that this invention is not to be limited to the specific forms herein described. Thus a powder box embodying this invention may be square, polygonal, and the like, instead of being cylindrical. Moreover, passage means containing a filtering-medium which is adapted to entangle powder thereon may be of other constructions than those shown and described herein for purposes of illustration. The scope of this invention is limited only by the language of the following claims.

We claim:

1. A powder box which comprises a container 'and a cover, said container and cover having longitudinally slidable telescoping walls and said box including a passage communicating between the outside of said box and the interior thereof affording a vent adapted for the movement of air therethrough in and out of said box upon removing and replacing said cover and a ltering medium disposed in said passage adapted to entangle powder thereon while permitting the movement of air through said passage, said filtering medium comprising a multiplicity of loosely disposed bers and affording little obstruction to the passage of air therethrough so that said cover can be removed from the box and replaced easily and quickly and so as to prevent building up of the box when said cover is thus removed or replaced.

2. A powder box which comprises a container and a cover, said container and cover having longitudinally slidable telescoping walls and the wall of said container including passage means having fixed walls and having one end in the interior of said box adjacent the top of said wall and another end on the exterior of said box adjacent the bottom of said wall and a ltering medium disposed in said passage between the ends thereof adapted to entangle powder thereon while permitting the movement of air through said passage.

3. A powder box which comprises a container and a cover, said container and cover having longitudinally slidable telescoping walls, and the wall of said container including an outer layer of sheet material and an inner layer of sheet material spaced from said outer layer by a porous filtering medium adapted to entangle powder thereon while permitting the mo'vement of air therethrough and adapted to afford passage means between said inner and outer layers affording communication for the passage of air between the interior and exterior of said box.

4. A powder box which comprises a container and a cover, said container and cover having longitudinally slidable telescoplng walls and said cover including passage means having one end in the interior of said box and another end on the exterior of said box and a filtering medium disposed in said passage between the ends thereof adapted to entangle powder thereon while permitting movement of air through said passage.

5. A powder box which comprises a container and a cover, said container and cover having longitudinally slidable telescoping walls and said cover including an outer layer of sheet material and an inner layer of sheet material spaced from said outer layer by a ltering mediumadapted to entangle powder thereon While permitting the movement of air therethrough and adapted to afford passage means between said inner and out-y er layers affording communication for the movement of air between the interior and exterior of said box.

6. A powder box which comprises a container and a cover, said container and cover having longitudinally slidable telescoping walls and said box including a passage communicating between the outside of said box and the interior thereof affording a vent adapted for the movement of air therethrough in and out of said box upon removing and replacing said cover and a iiltering medium disposed in said passage adapted to entangle powder thereon while permitting the movement of air through said passage, said passage being between two relatively immovable wall members of a double wall forming part of said box.

7. A powder box which comprises a container and a cover, said container and cover having longitudinally slidable telescoping walls and said box including a passage having xed walls and communicating between the outside of said box and the interior thereof affording a vent adapted for the movement of air therethrough in and 'out of said box upon removing and replacing said cover and a filtering medium disposed in said passage adapted to entangle powder thereon while permitting the movement of air through said passage.

HORACE M. CARTER. WALTER LANGER..

CFI 

